Monetizing Apps using Google Mobile Ads SDK for Flutter

Monetizing Apps using Google Mobile Ads SDK
Monetizing Apps using Google Mobile Ads SDK

🎁 Reward Coins increases after watching the Rewarded Video Ad

Flutter AdMob Test Ads App
Flutter AdMob Test Ads App

How do I display AdMob ads in my Flutter app and start earning revenue 💰?

Prerequisites 📝

  1. Flutter 1.22.0 or higher ✅
  2. Android
  • Android Studio 3.2 or higher ✅
  • Target Android API level 19 or higher ✅
  • Set compileSdkVersion to 28 or higher ✅
  • Android Gradle Plugin 4.1 or higher ✅

step 1 : Adding the package in pubspec.yaml

dependencies:google_mobile_ads: ^0.11.0+4
Adding Flutter Package
Adding Flutter Package

step 2 : Add meta data to Android-Manifest.xml

  • Navigate to Android Manifest.xml file
  • Path to file : android/app/src/main/AndroidManifext.xml
  • Sample AdMob App ID: ca-app-pub-3940256099942544~3347511713
<manifest>
<application>
<!-- TODO: Replace ca-app-pub-################~########## with your AdMob App ID or Sample Admob App ID -->
<meta-data
android:name="com.google.android.gms.ads.APPLICATION_ID"
android:value="ca-app-pub-################~##########"/>
</application>
</manifest>
Add meta data to Android-Manifest.xml
Add meta data to Android-Manifest.xml

step 3 : Coding — Sample Flutter App Code

📌How to Integrate Banner Ads into a Flutter app ?

Flutter Mobile Ads AdMob Banner Ad
Flutter Banner Ad

📌How to Integrate Interstitial Ads into a Flutter app ?

Flutter Mobile Ads AdMob Interstitial Ad
Flutter Interstitial Ad

📌How to Integrate Rewarded Video Ads into a Flutter app ?

Flutter Mobile Ads AdMob Rewarded Video Ad
Flutter Rewarded Video Ad

💻This is a simple app demo to learn how to integrate admob ads in your flutter app.

Flutter Google Mobile Ads SDK - Dart Code
$ flutter clean
$ flutter run

GitHub Repository :📂 flutter_test_ads_app

🔨 Top 3 Common Error Messages and Guide to Fix them

Running Gradle task 'assembleDebug'...                                  
/android/app/src/debug/AndroidManifest.xml Error:
uses-sdk:minSdkVersion 16 cannot be smaller than version 19 declared in library [:google_mobile_ads] /build/google_mobile_ads/intermediates/library_manifest/debug/AndroidManifest.xml as the library might be using APIs not available in 16
Suggestion: use a compatible library with a minSdk of at most 16,
or increase this project's minSdk version to at least 19,
or use tools:overrideLibrary="io.flutter.plugins.googlemobileads" to force usage (may lead to runtime failures)

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:processDebugManifest'.
> Manifest merger failed : uses-sdk:minSdkVersion 16 cannot be smaller than version 19 declared in library [:google_mobile_ads] build/google_mobile_ads/intermediates/library_manifest/debug/AndroidManifest.xml as the library might be using APIs not available in 16
Suggestion: use a compatible library with a minSdk of at most 16,
or increase this project's minSdk version to at least 19,
or use tools:overrideLibrary="io.flutter.plugins.googlemobileads" to force usage (may lead to runtime failures)

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 2m 35s
Running Gradle task 'assembleDebug'...
Running Gradle task 'assembleDebug'... Done 156.1s (!)
Exception: Gradle task assembleDebug failed with exit code 1
  • Navigate to build.gradle file
  • Path to file : android/app/build.gradle
  • compileSdkVersion 29
  • minSdkVersion 19 ✅
  • targetSdkVersion 29
minSdkVersion 19 or higher
minSdkVersion 19 or higher
FAILURE: Build failed with an exception.                                

* What went wrong:
Execution failed for task ':app:processDebugResources'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
> Android resource linking failed
/home/.gradle/caches/transforms-2/files-2.1/554200784d0157df45da8212b6e09519/play-services-ads-lite-19.7.0/AndroidManifest.xml:27:5-43:15: AAPT: error: unexpected element <queries> found in <manifest>.


* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 9s
Running Gradle task 'assembleDebug'...
Running Gradle task 'assembleDebug'... Done 9.9s
The built failed likely due to AndroidX incompatibilities in a plugin. The tool is about to try using Jetfier to solve the incompatibility.
Building plugin google_mobile_ads...
Exception: The plugin google_mobile_ads could not be built due to the issue above.
  • Path to file : /android/build.gradle
dependencies { classpath 'com.android.tools.build:gradle:3.5.0' classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" }
  • Change version to 4.1.1
dependencies { classpath 'com.android.tools.build:gradle:4.1.1' classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" }
build gradle version 4.1.1
build gradle version 4.1.1
FAILURE: Build failed with an exception.                                

* Where:
Build file '/android/app/build.gradle' line: 24

* What went wrong:
A problem occurred evaluating project ':app'.
> Failed to apply plugin [id 'com.android.internal.version-check']
> Minimum supported Gradle version is 6.5. Current version is 5.6.2. If using the gradle wrapper, try editing the distributionUrl in /android/gradle/wrapper/gradle-wrapper.properties to gradle-6.5-all.zip

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 425ms
Running Gradle task 'assembleDebug'...
Running Gradle task 'assembleDebug'... Done 0.9s
Exception: Gradle task assembleDebug failed with exit code 1
  • Path to file : /android/gradle/wrapper/gradle-wrapper.properties
distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip
  • Change the distributionUrl zip package to gradle-6.5-all.zip
distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-all.zip
Gradle wrapper properties distribution urls - gradle-6.5-all.zip
Gradle wrapper properties distribution urls - gradle-6.5-all.zip

📚Useful Resources

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